Dust-extractor



A (Hommel.) l l l u G. BROWN. DUST EXTRAGTOR.

'No.vmoo. Patentledem, 1897.

. UNITED STATES PATENT OFFICE.

GEORGE H. BROWN, OF DUBUQUE, IOWA, ASSIGNOR TO THE CHICAGO PNEUMATICTOOL COMPANY, OF CHICAGO, ILLINOIS.

DUST-EXTRACTOR.l

SPECIFICATION forming part of Letters Patent No. 577,006, dated.February 16, 1897. Application filed June 15, 1896. Serial No. 595,575.(No model.)

To a/ZZ whom, it 71u11/ concern,.-

Beit known that I, GEORGE H. BROWN, of the city of Dubuque, in thecounty of Dubuque and State of Iowa, have invented a certain new anduseful Improvement in Pneumatic Dust-Extractors, of which. the followingis a description, reference being had to the accompanying drawings,forming part of this specification.

My invention has for its principal object the provision of a novel andeflicient device for removing dust from the upholstered seats h ofrailway-cars, whereby such seats may be through a discharge-pipeconnected to the casing.

The device is small andlight and can be readily moved over theupholstered surface` of the bottom and back ofthe car-seat to extractthe dust from all parts thereof, while the discharge-pipe can be led out.through the window of the car, so that the dust will be carried awayand not permitted to settle back inthe car.

In the accompanying drawings, Figure l is a view showing the device inposition for use upon a car-seat with the supply-pipe for'the compressedair and the discharge-pipe leading through the ear-window connected toit, and Fig. 2 a vertical section of the device itself on a largerscale.

The same letters of reference are used to indicate identical parts inboth figures.

In the drawings, A represents a casing of sheet metal, having a aringlower end and an upper end suitably shaped for the connection of thelarge flexible discharge-pipe B. Entering the lower flaring portion ofthe casing A at one side is a pipe C, whose inner end is bent upward andterminates Vin a nozzle immediately below the apex of an inverted coneD, which is supported within the upper half of the casing A, as shown,leaving a narrow annular space around its upper edge between thelatterand the surrounding casing A. The lower part of the upper half of thecasing A is preferably tapered inward toward its j unction with theupper end of ythe lower half of vthe casing at ct, so as to somewhatconform it inshape to the exterior of the cone D Within it. Compressedair is admitted to the device through the pipe C, which is connected bya iiexible hose with the source of supply and is provided with athrottle-valve E to control the admission of the air. The air escapingfrom the upturned nozzle at the inner end of the pipe C is deiiectedaround the cone D and passes upward through the narrow annular passagearound the -upper edge of the cone, thereby producing a current of airupward through the lower flaring portion of the casing. Vhen the latteris placed upon the surface oi' the cushioned car-seat, a partial vacuumwill be produced within the lowerflaring part of the casing by thismeans and the particles of dust and other free matter upon or adjacentthe surface of the cushion will be drawn upward through the casing andcarried out the discharge-pipe B. The outer end of the latter may befitted in and extend through a board F, adapted to be fitted into t-hewindow-opening of the car beneath the window and held in place byletting the window down upon it, as in the use of the ordinary wirescreen in sleeping-cars. This will furnish an exit for the pipe from thecar and prevent any of the dust being blown back into the car.

I also provide the lower flaring portion of the casing A with one ormore cross-bars G, whose lower edges preferably project slightly belowthe lower edge of the casing, the purpose of which bars is to agitatethe nap of the plush covering of the cushion as the device is moved overthe same and thus facilitateuthe escape of the dust therefrom.

From the foregoing description it will be seen that by the use of mynovel device the dust may -be readily removed from the cushions andbacks of car-seats without moving them from position and be conveyedoutside the car through the discharge-pipe, s o that it IOO cannotsettle back upon them or in the car, as it does when it is simply beatenont or brushed off of them. The flexible dischargepipe may be ofsuflicient length to permit a number of seats to be cleaned Withoutmoving its discharging end from one Window to another, or it may beshorter Land be moved from Window to Window as one seat after another iscleaned.

It will of course be evident that the utility of my novel dust-extractoris not confined to the removal of dust from car-seats, but may beemployed for the removal of dust from upholstered furniture generally,and from cushions, carpets, &c.

I am aware that it has heretofore been proposed to extract the dust fromcarpets, cushions, the., by means of a current of compressed airdirected into a casing having an open end adapted to rest upon and bemoved over the surface of the carpetor cushion and having adischarge-pipe connected to its upper end, and that it has also beenproposed to extractthe dust from su ch objects by Withdrawing the air bymeans of a rotary fan from a suitable casing having an open lower endadapted to rest upon and be moved over the surface of the cushion; butthese devices are different in construction and operation from mine.

Having thusy fully described my invention, I claim- 1. Theherein-described pneumatic dustextractor, comprising the casing A havinga flaring lower end adapted to rest upon and be moved over the surfacefrom which the dust is to be extracted, the inverted cone D supported inthe upper part of said casing, the air-inlet pipe O entering the casingand terminating in the upturned nozzle immediately below the apex of thecone D, and the discharge-pipe B connected to the upper end of thecasing, substantially as and for the purpose set forth.

2. The herein-described pneumatic dustextractor, comprising the casing Ahaving the flaring lower portion provided with the cross bar or bars G,the inverted cone D supported in the upper part of the casing, theair-inlet pipe C entering the casing and terminating in the upturnednozzle immediately below the apex of the cone, and the discharge-pipe Bconnected to the upper end of `the casing, substantially as and for thepurpose set forth.

3. rlhe herein-described pneumatic dustextractor, comprising the casingA, inverted cone D, discharge-pipe B, and air-inlet pipe C arranged asshown, in combination with the board F having the discharging end'of thepipe B fitted in an opening therein, substantially as and for thepurpose set forth.

GEO. H. BROVN.

NVitnesses:

H. M. LORMAN, I. G. STUTsMAN.

